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24 August, 02:40

Palmers average running speed is 3 kilometers per hour faster than his walking speed. If Palmer can run around a 40-kilometer course in 4 hours, how many hours would it take for Palmer to walk the same course?

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  1. 24 August, 02:59
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    R=40/4=10km/hr

    w=r-3

    w=10-3

    w=7km/hr

    t=40/7 hr

    t=5 5/7 hr

    t≈5.714 hr (to nearest thousandth of an hour ... ≈5:42:51)
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